Neocorynura euadne (Schrottky, 1909)

Smith-Pardo, Allan H., 2010, Taxonomic review of the species of Neocorynura (Hymenoptera: Halictidae: Augochlorini) inhabiting Argentina and Paraguay, Zootaxa 2507, pp. 44-68 : 48-51

Neocorynura euadne (Schrottky, 1909)

( Figs. 2 , 8 )

Corynura euadne Schrottky, 1909: 146

Neocorynura euadne ; Schrottky, 1913: 240 (taxonomic position as Neocorynura )

Diagnosis. Females of Neocorynura eaudne can be easily recognized by their densely pubescent mesoscutellum and metanotum. This species can be distinguished from N. codion by its completely black head, mesoscutellum and metanotum completely covered by minute, branched, yellow setae (same setae more disperse and light brown in N. codion ) and by the base of propodeum striated (sulcate in N. codion ).

Description: Female (Neotype). Body length 10.3 mm; forewing length 7.4 mm. Head width 2.2 mm, length 1.9 mm. Scape longer than combined lengths of F1–F6; F10 longer than preceding flagellomeres; F1 as long as F2. Clypeus wider than long; paraocular lobe obtuse (≈ 115°). Mesoscutum slightly wider than long; metanotum more than half the length of mesoscutellum. Mesotibial spur serrate and more than half length of mesobasitarsus; inner metatibial spur pectinate with 5 teeth, the last two separate. Marginal cell semi-truncate; 1m-cu almost confluent with 1rs-m; 2m-cu basad 2rs-m by approximately 5 times vein width; first submarginal cell almost as long as combined lengths of second and third submarginal cells; second submarginal rectangular; anterior border of second submarginal cell slightly longer than anterior border of third submarginal cell; pterostigma large, margin in marginal cell convex; hamuli spaced 3-1-3 along anterior margin of hind wing. Basal area of propodeum sulcate and longer than mesoscutellum. Metasoma semipetiolate (slightly longer than wide).

Labrum weakly striate, with small, more or less narrow central process. Clypeus imbricate with coarse punctures separated by less than 1 PD; supraclypeal area imbricate with punctures smaller and widely distributed; subantennal and lower ocular areas imbricate and densely punctate; frons and remainder of face with smaller and more numerous punctures, integument between punctures strongly imbricate; vertex sculptured as frons; gena and postgena striate with small punctures. Scape imbricate, with punctures separately by about 1 PD. Pronotum mostly smooth or faintly imbricate; propleura striate and imbricate. Mesoscutum densely punctate, punctures coarse and separated by less than 1 PD, integument between punctures strongly imbricate; mesoscutellum and metanotum smooth and densely punctate, punctures of different diameter. Pleura strongly punctate with a rugose appearance, integument between punctures strongly imbricate. Tegula faintly imbricate. Basal area of propodeum striate and slightly imbricate in between.

Mandible dark brown, tip hyaline. Labrum black; clypeus black; remainder of head black except for parocular area with coppery reflections. Mesosoma black except for the metallic green margins of mesoscutum, mesoscutellum, and metanotum. Legs dark brown. Metasoma black, except T2–T3 with narrow, metallic, basal bands.

Mandible with brown, unbranched setae, 0.5–2.0 OD in length, scattered. Labrum mostly bare with a row of coarse, brown, unbranched setae along anterior margin. Clypeus with light brown and branched setae, minute— 0.5 in length, sparsely distributed over surface some minute setae present on lateral margins and close to compound eyes. Supraclypeal area as on clypeus; subantennal area and frons with white, minute branched setae more or less densely distributed and with some sparse black, poorly branched setae 0.5–1.0 OD in length among the white ones. Scape mostly with minute brown, poorly branched setae sparsely distributed few longer setae (0.5 OD) close to scape base. Vertex as on frons, except for some coarse, light brown setae sparsely distributed; gena with minute, white setae densely distributed; postgena with white, branched setae, 0.5–2.5 OD in length scattered. Pronotum covered with minute, whitish setae broadly distributed along with some coarse, dark brown and branched setae. Mesoscutum with minute, brown setae more or less densely distributed and with some 0.5 OD length, poorly branched, dark brown setae scattered among the minute ones. Mesoscutellum as metanotum densely covered with minute, yellowish brown setae. Base of propodeum mostly bare, rest of surface with minute, brown setae, densely distributed on posterior sides, longer setae (1.0 OD) close to spiracles. Preepisternum and mesepisternum with coarse, light brown setae, 1.0–1.5 OD in length, scattered among minute, whitish setae; metepisternum densely covered with minute, whitish setae. Procoxa with coarse, dark brown setae, poorly branched, and 1.0–1.5 OD in length scattered among minute, light brown ones; protrochanter mostly bare but with some coarse, light brown, unbranched setae, 1.0–3.0 OD in length along posterior margin mixed with some minute, light brown setae; profemur with outer side mostly covered with light brown, poorly branched setae, sparsely distributed and 0.5–2.0 OD in length (longer ones close to trochanter), inner surface more densely covered with minute, whitish setae; protibia with outer side mostly covered with minute light brown setae, densely distributed, inner surface more densely covered with longer setae (minute—1.0 OD); tarsi as in protibia; mesocoxa covered with minute, whitish setae, with few coarse, light brown, unbranched setae, 1.0–2.0 OD in length close to articulation with mesotrochanter; mesotrochanter with light to dark brown, unbranched setae, 0.5–2.0 OD in length mixed with some minute, light brown setae; mesofemur inner side with coarse, light brown setae, 0.5 OD in length and densely distributed in anterior angle and forming a patch, rest of surface with coarse, dark brown, poorly branched setae, minute—2.0 OD in length, sparsely distributed; mesotibia densely covered with unbranched setae, minute—0.5 OD in length, those on posterior margin dark brown on base and white on tip; mesotarsi as protarsi; metacoxae as procoxae, except setae more abundant and dark brown, 0.5– 1.5 OD in length; metatrochanter more or less densely covered with coarse, dark brown, branched setae, 0.5– 1.0 OD in length; metafemur with coarse, dark to light brown setae, long (some as long as 3.5 OD) somehow bending and forming scopae; metatibia sparsely covered with coarse, dark brown setae, those in anterior margin 1.0–1.5 OD in length, sparsely distributed, and with 3–4 branches mostly on tip, rest of surface with coarse, dark brown or white, unbranched setae, more or less densely distributed. T1 with coarse, white, poorly branched setae, 1.0–1.5 OD in length and sparsely distributed; T2 and T3 densely covered with minute, brown setae, with some coarse, dark brown, unbranched setae sparsely distributed and with a basal band of minute, yellowish setae; T4 as T2 and T3 except, darker setae more abundant and almost 1.5 OD in length and with basal band of setae; T5 densely covered with coarse, brown setae, minute—2.5 OD in length, some branched and sparsely distributed among unbranched ones, lateral region with longer ones (1.5–2.0 OD).

Male (same locality as the female Neotype). As described for the female except as follows: Body length 8.9 mm; forewing length 6.1 mm. Head width 1.9 mm, length 1.7 mm. F2 longer than F1. Mandible slender and pointed and without preapical teeth. Labral surface smooth. Paraocular lobe more angular. Mesoscutum slightly wider than long. Basitibial plate absent; inner metatibial spur almost one fourth the length of metabasitarsus, rather slender and serrated. Hamuli with a spacing pattern 3-1-1-2. Basal area of propodeum broadly sulcate. Metasoma with a slightly more elongate appearance; S6, S7, S8, and genital capsule as in Fig. 2 .

Mandible without grooves on outer surface, slightly carinate along posterior margin, anterior margin continuous. Subantennal and lower ocular areas densely punctate. Mesoscutellum with punctures of irregular size and shape. Posterior side of propodeum with coarse punctures.

Clypeus and frons metallic dark green; paraocular areas metallic light green; rest of the head dark, almost black. Tegula slightly more translucent. Legs uniformly light brown. T1–T4 with basal third metallic green to metallic yellow.

Mandible with some coarse, light brown, branched setae, 0.5 OD in length. Labrum mostly bare. Postgena with some long setae (0.5–2.0 OD in length) more sparsely distributed. Metanotum in general with longer setae (0.5–2.0 OD) sparsely distributed. Legs (especially hind ones) in general less pubescent; protrochanter with some light brown, unbranched setae minute—1.0 OD in length scattered on the posterior margin; profemur with white setae, 0.5–1.0 OD in length on posterior margin; protibia less densely covered; mesofemur with most of the inner side bare; metatrochanter poorly covered with setae, most of them unbranched; metafemur with some white, minute—1.0 OD in length setae, sparsely distributed on anterior margin. Metasomal pubescence as in the female except setae white and densely distributed; sterna with less pubescence, setae more scattered on S1–S3.

Type material. Holotype: Not designated by Schrottky (1909).

Neotype. 3, PARAGUAY: Puerto Bertoni [Alto Paraná]. C. Schrottky Coll. This specimen was identified and labeled as Corynura euadne by Schrottky (the same author who originally described the species). Herein, I propose this specimen to be considered as the Neotype due to the fact that the species author identified and labeled this specimen (from the type locality) as belonging to the same species, and because the re-description above circumscribes the short description for the species by Schrottky (1909). Neotype designation is needed to give grounds for recognition of this species as distinct from similar species and is justified under the qualifying conditions listed in Article 75.3 of the International Code of Zoological Nomenclature ( ICZN 1999). A Neotype-label was added to the specimen to make its recognition unambiguous.

Neotype depository: The Natural History Museum of Los Angeles (LACM), Los Angeles, California.

Additional examined material. PARAGUAY: Caaguazu, Pastoreo N. E. Coronel Oviedo. 1-5-1972. L. Peña Coll. (1 Ƥ AMNH), IV-1963. F. H. Walz Coll. (1 Ƥ AMNH); Itapuá, Pirapo N. E. of Encarnación. 1-5- 1972. L. Peña Coll. (1 3 AMNH); Serro [probable misspelling of the word “Cerro” = hill] Pelado. 11-1951. F.H. Solade Coll. (1 3 SEMC).

Figures

FIGURE 2. Neocorynura euadne (Schrottky, 1909): lateral habitus of the female (top left), lateral habitus of male (bottom left); male terminalia: a: genital capsule: ventral (left half) and dorsal (right half), b: genital capsule lateral view, c: fused S 7 + S 8. Scale = 1.0 mm.

FIGURE 8. Geographic distribution of the species of Neocorynura inhabiting Argentina and Paraguay.